Company tool over a Magento shop from an internal solo developer. They made a new theme based on a bought theme, but the developer who started it is leaving. The 'developer' (yes, quoting it now) made a royal mess about it; rewriting core files, overwriting theme files, leaving JavaScript alerts all over the place, placing business logic in templates and defining CSS classes with functions in custom module block classes. I could go on for a while. After the first sprint we tried to convince the customer to do a complete rebuild, but we couldn't convince him...

The 'developer' has been hold on for now to give support on his crappy code and my next few months are filled with working in this mess without cleaning up the technical debt because we don't have enough time for that... FML